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Clara Nelson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Iowa
Our Model Tree links this Clara Nelson across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 3-person household.
Age 50
b. ~1890
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Iowa |
| Surname | Nelson |
| Given Name | Clara |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Housekeeper |
| Industry | at home |
| Class of Worker | NP |
| Hours Worked | 60 |
| Highest Grade | 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Housekeeper |
| Township / Ward | Polk Twp |
| Est. Birth Year | ~1890 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clara | Age | Birth yr |
|---|---|---|---|---|
| Mark Nelson | Son | — | 16 | ~1924 |
| G Nelson | Head | — | 52 | ~1888 |
| Clara Nelson | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Jefferson, Iowa
Spouse, age 29
Jefferson, Iowa · implied b. ~1891 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Clara |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Jefferson, Iowa
Spouse, age 40
Jefferson, Iowa · implied b. ~1890 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Clara |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 17 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Jefferson-County, Iowa
Spouse, age 50
Jefferson-County, Iowa · implied b. ~1890 — 3 household members
| Surname | Nelson |
| Given Name | Clara |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Jefferson |
| Occupation | Housekeeper |
| Industry | at home |
| Class of Worker | NP |
| Hours Worked | 60 |
| Highest Grade | 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Clara Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Clara Nelson
Spouse · 1940 · age 50 · b. ~1890 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Jefferson-County, Iowa
Open full size
1940 US Federal Census — Jefferson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01170-00443)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | H. N. Mcburney | 56 | Head | Farming | Iowa |
| 2 | Cora Mcburney | 53 | Wife | Housekeeper | Iowa |
| 3 | Russell Sassen | 30 | Head | Farming | Iowa |
| 4 | Lolla Sassen | 27 | Wife | Housekeeper | Iowa |
| 5 | Joyce Sassen | 5 | Daughter | — | Iowa |
| 6 | Janet Sassen | 3 | Daughter | — | Iowa |
| 7 | G. R. Nelson | 52 | Head | Farming | Iowa |
| 8 | Clara Nelson THIS PERSON | 50 | Wife | Housekeeper | Iowa |
| 9 | Mark S. Nelson | 16 | Son | — | Iowa |
| 10 | Paul Mowery | 58 | Head | Farm | Iowa |
| 11 | Carrie Kriegh | 56 | Housekeeper | Housekeeper | Iowa |
| 12 | Cora Kriegh | 81 | Mother | — | Illinois |
| 13 | Jean Kriegh | 14 | Niece | — | Iowa |
| 14 | Ralph Degood | 55 | Head | Farming | Iowa |
| 15 | Vera O. Degood | 50 | Wife | Housekeeper | Iowa |
| 16 | Leslie Degood | 30 | Son | Farming | Iowa |
| 17 | Grace Friend | 51 | Head | Farming | Iowa |
| 18 | Mable Friend | 47 | Wife | Housekeeper | Nebraska |
| 19 | Lee Friend | 16 | Son | — | Iowa |
| 20 | Lucille Friend | 15 | Daughter | — | Iowa |
| 21 | Jean Mix | 36 | Head | Farming | Iowa |
| 22 | Margaret Mix | 26 | Wife | Housekeeper | Iowa |
| 23 | Mix | None | — | — | — |
| 24 | Walter Clark | 29 | Head | Road Foreman | Iowa |
| 25 | Hilda Clark | 29 | Wife | Housekeeper | Iowa |
| 26 | Elizabeth Ann Clark | 7 | Daughter | — | Iowa |
| 27 | G. W. Wiggins | 54 | Head | Farming | Iowa |
| 28 | Jessie Wiggins | 47 | Wife | Housekeeper | Missouri |
| 29 | Carl Edmund | 50 | Head | Farming | Iowa |
| 30 | Bessie Edmund | 50 | Wife | Housekeeper | Illinois |
| 31 | Virginia Edmund | 19 | Daughter | — | Iowa |
| 32 | Jennie Jo Edmund | 15 | Daughter | — | Iowa |
| 33 | Kathryn Edmund | 9 | Daughter | — | Iowa |
| 34 | Hale Cornwell | 57 | Head | Farming | Iowa |
| 35 | Hazel Cornwell | 50 | Wife | Housekeeper | Iowa |
| 36 | Margaret Cornwell | 20 | Daughter | Teacher | Iowa |
| 37 | Mary Betty Cornwell | 19 | Daughter | — | Iowa |
| 38 | Ruth Eleanor Cornwell | 18 | Daughter | Mail Clerk | Iowa |
| 39 | Guy Warren Cornwell | 13 | Son | — | Iowa |
| 40 | Charles Edmund | 83 | Father | Farming | Sweden |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)